http://store.steampowered.com/app/455940/
💎💎💎💎💎💎💎💎
STEAM KEY REGION FREE GLOBAL

Odd||Even is a math and logic based, integer placement puzzle game created by irritatingFLY studio.
Oddeven-game

Features
★ powerful puzzle generator with natural interface
★ feature rich mathematical-software
★ full control given to users
★ sharp graphics
★ 90 logical selected puzzles
★ full rights (once purchased you can use generated puzzles as you like, even for commercial use)

Activation Instructions:

1. You need to download and install Steam http://steampowered.com/download/SteamInstall.msi
2. Go to your account or register a new one.
3. Go to the "My Games" and select "Activate via Steam ...", and enter the key received after payment.
4. Once activated, the game will appear in the game list (Library) and you can download it